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  1. The ratio of the number of boys and girls in a college is 7:8. If the percentage increase in the number of boys and girls be 20% and 10% respectively. What will be the new ratio?
    2. A.
    8:9
    B.
    17:18
    C.
    21:22
    D.
    Cannot be determined

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    Answer : Option C

    Explanation :

    Originally, let the number of boys and girls in the college be 7x and 8x respectively. 

    Their increased number is (120% of 7x) and (110% of 8x).

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